A Tibetan monk set himself on fire Monday in southwest China's Sichuan province, authorities said Tuesday.

Losang Gyatso, 18, from the Kirti monastery in the Aba Tibetan-Qiang autonomous prefecture, set himself ablaze at Qiatang west street in the county, reported Xinhua.

The report did not say what prompted the monk to commit self-immolation.

A 19-year-old Tibetan nun died following self-immolation in the same prefecture Saturday evening. Tenzin Choedron belonged to Siwa nunnery.